LEPIDOPTERA
S A T Y R I D A E Boisduval, 1833
EREBIA Dalman, 1816
Erebia troubridgei Dubatolov, 1992
Erebia troubridgei Dubatolov, 1992
· TYPE LOCALITY. Yakutia, 232 road-km from Khandyga to Magadan, upper flow of Khandyga River.
· RANGE. From central Yakutia to the W. Chukot Peninsula.
· TAXONOMIC NOTES. This species is frequently regarded as a subspecies of E. dabanensis, but we know several localities in NE. Yakutia where the two taxa occur sympatrically. There is also some probability that troubridgei is a junior synonym of tschuktscha Herz, 1903, a taxon hitherto never revised.
· HABITAT AND BIOLOGY. Flight in June-July in lowland meadows and over stony slopes.
· SIMILAR SPECIES. E. dabanensis: UNF black ocelli placed within a single band; all ocelli rounded. E. fletcheri: larger; UNH postdiscal band well-defined. E. kozhantschikovi: larger; UNF ocelli placed within a single reddish-brown band; UNH postdiscal band contrasting, shaded with silvery colour from both sides. E. occulta: discal band not defined; ocelli reduced.
Table 1. Comparative features of the dabanensis-group males
Features |
Dabanensis |
Kozhantschikovi |
Occulta |
Troubridgei |
Fletcheri |
UPF band |
consists of separate spots |
consists of separate spots |
consists of separate spots |
consists of separate reduced spots |
broad, well-defined |
UPF ocelli |
4-5 round ocelli |
the first 2 ocelli larger and extended |
2-3 oblong ocelli, very small or absent |
the first 2 ocelli elongated but not larger the others |
4-5 oblong ocelli |
UNF band |
complete or slightly broken by veins |
complete, broken by veins |
consists of separate reduced spots |
consists of separate spots |
complete |
UNH band |
contrasting against silvery ground colour |
contrasting against silvery ground colour |
not contrasting |
little contrasting |
little contras-ting |
FW length |
21-23 mm |
20-22 mm |
22-25 mm |
20-22 mm |
22-24 mm |
Photo and text: Guide to the BUTTERFLIES OF RUSSIA and adjacent territories Volume 1. PENSOFT, Sofia - Moscow. 1997